The popular Dune lightly textured and microperforated surface combines good sound absorption and sound attenuation performance. It is available in a range of sizes including the unique Vector edge detail.

A single-number rating for flanking sound transmission between adjacent rooms, as calculated by reference to EN ISO 717-1.

A single-number rating for sound attenuation of a suspended ceiling sharing a common ceiling plenum above adjacent rooms, as calculated by reference to EN ISO 717-1.
Dncw values remain valid although Dnfw, which is essentially the same as Dncw, has superseded it.